X11 Wont Start Without A Monitor Attached

Jun 27, 2009

I've got a small box running as a fileserver with CentOS 5. Sometimes life is a little easier using a GUI for jobs rather than SSH.

As this is not accessible externally, I've got it to autologin to a non-privilaged user, and as part of that logon a VNC session is opened using the inbuilt remote desktop tool.

This was working perfectly, until I realised if I cold boot the server without a monitor attached, X11 wont start at all unless I attach a monitor to it.

I know I can start a VNC session from using vncserver, but this way allows me to logon to the server as if I was sat infront of it, rather than running an extra session.

Presumabley I can add something into /etc/X11/xorg.conf so X11 will start without a monitor hooked up?

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